October 2025
Intermediate to advanced
570 pages
16h 46m
Portuguese (Portugal, Brazil)
book
Dominando o Ethereum, 2nd Edition
by Carlo Parisi, Alessandro Mazza, Niccolo Pozzolini, Gavin Wood, Andreas M. Antonopoulos
Content preview from Dominando o Ethereum, 2nd Edition
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Capítulo 15. Consenso
Este trabalho foi traduzido com recurso a IA. Agradecemos o teu feedback e comentários: translation-feedback@oreilly.com
Ao longo deste livro, falamos sobre regras de consenso - asregras com as quais todos devem concordar para que o sistema opere de forma descentralizada e determinística. Na ciência da computação, o termo consenso é anterior às blockchains e está relacionado ao problema mais amplo de sincronizar o estado em sistemas distribuídos, de modo que os diferentes participantes de um sistema distribuído concordem (eventualmente) com um único estado em todo o sistema. Isso é chamado de chegar a um consenso.
Quando se trata das principais funções de manutenção e verificação de registros descentralizados, pode ser problemático confiar apenas na confiança para garantir que as informações derivadas das atualizações de estado estejam corretas. Esse desafio bastante geral é particularmente pronunciado em redes descentralizadas porque não há uma entidade central para decidir o que é verdade. A falta de uma entidade central de tomada de decisões é um dos principais atrativos das plataformas de blockchain devido à capacidade resultante de resistir à censura e à falta de dependência da autoridade para obter permissão de acesso às informações. No entanto, esses benefícios têm um custo: sem um árbitro confiável, quaisquer desacordos, enganos ou diferenças precisam ser reconciliados por outros meios. Os algoritmos de consenso são o mecanismo usado para conciliar ...
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